Fermat's works were published by Tannery and Henry in four volumes, the last of which appeared in 1912.

An additional volume was edited by de Waard in 1922:

Fermat, P. Oeuvres de Fermat: Suppl'ement aux tomes I--IV. Documents in'edits publi'es avec notices sur les nouveaux manuscrits par M.V. De Waard 1922.

I have the pdfs for Tannery's volumes but I can't find one for de Waard. Does anyone have a pdf for de Waard and/or know where one can find one?

Fermat's works were published by Tannery and Henry in four volumes, the last of which appeared in 1912.

An additional volume was edited by de Waard in 1922:

Fermat, P. Oeuvres de Fermat: Supplément aux tomes I--IV. Documents inédits publiés avec notices sur les nouveaux manuscrits par M.V. De Waard 1922.

I have the pdfs for Tannery's volumes but I can't find one for de Waard. Does anyone have a pdf for de Waard and/or know where one can find one?